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* Although old code in GHC is not warning-clean, we want new code to be, and we are gradually cleaning the old modules. Here is [wiki:WorkingConventions how to cooperate with this].

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* Although old code in GHC is not warning-clean, we want new code to be, and we are gradually cleaning the old modules. Here is [wiki:Commentary/CodingStyle#Warnings how to cooperate with this]. The rest of the same page describes the coding conventions we encourage you to use.